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Current Affairs January 2024

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4

High resistance values are a consequence of the ___ of the film.

A. Thickness

B. Length

C. Thinness

D. Area

Correct Answer :

C. Thinness


Related Questions

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4

The result of rust in electrical (wire) connection is

A. Inductance

B. Conductance

C. Impedance

D. Resistance

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A lead conductor has a resistance of 25 at 0 �C. Determine its resistance at -30 �C

A.

B.

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4

It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.

A. Infinite

B. Zero

C. Low

D. High

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4

Which component opposes voltage change?

A. Resistor

B. Inductor

C. Capacitor

D. Transistor

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A capacitor opposes change in

A. Voltage

B. Current

C. Voltage and current

D. Neither voltage nor current

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4

Refers specifically to steady state values of quantities in ac circuits which are complex numbers.

A. Domain

B. Scalar quantity

C. Vector quantity

D. Phasor quantity

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In calculating maximum instantaneous power ___ voltage or current is used.

A. Peak

B. Average

C. Rms

D. Instantaneous

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What determines the magnitude of electric current?

A. The rate at which electrons are produced

B. The type of material used

C. The current carrying capacity of the circuit

D. The rate at which electrons pass a given point

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4

In an inductive coila the rate of rise of current is maximum

A. Near the final maximum value of current

B. At midvalue of current

C. At half-power points

D. After one time constant

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4

When capacitors are connected in seriesa the total capacitance is

A. Smaller than the smallest capacitor

B. Smaller than the largest capacitor

C. Greater than any of the capacitor

D. Greater than the largest capacitor

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4

Voltage resonance means

A. Series resonance

B. Parallel resonance

C. Current magnification

D. Gain magnification

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4

The curve between current and frequency is termed as

A. Voltage curve

B. Gain curve

C. Power curve

D. Resonance curve

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4

And ideal current source has an internal conductance of _____ siem

A. Infinite

B. One

C. Zero

D. One million

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4

In an ac circuit with a resistive branch and an inductive branch in parallela the

A. Voltage across the inductance leads the voltage across the resistance by 90°

B. Resistive branch current is 90° out of phase with the inductive branch current

C. Resistive and inductive branch currents have the same phase

D. Resistive and inductive branch currents are 180° outof-phase

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4

Which is considered as the effect of a dielectric material?

A. Increasing capacitance

B. Decreasing capacitance

C. Reducing the working voltage

D. Increasing the distance between the plates

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4

A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?

A.

B.

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If two equal resistances connected in series across a certain supply are now connected in parallel across the same supplya the power produced will be _____ that of series connection

A. One-half

B. One-fourth

C. Two times

D. Four times

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4

The reason why alternating current can induce voltage is

A. It has high peak value

B. It has a stronger magnetic field than direct current

C. It has a constant magnetic field

D. It has a varying magnetic field

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4

In a rectangular wavea the form factor is

A.

B.

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4

If a multiplate capacitor has 10 platesa each of area 10 cm2a then

A. 10 capacitors will be in parallel

B. 10 capacitors will be in series

C. 9 capacitors will be in parallel

D. 9 capacitors will be in series

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4

Which of the following is the statement of Ohm�s law?

A. Electric current is directly proportional to both voltage and resistance

B. Electric current varies directly as the voltage and inversely as the resistance

C. Electrical power is directly proportional to the resistance and inversely as the current squared

D. Electrical power is directly proportional to both voltage squared and the resistance

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4

What is the total capacitance of 10 capacitorsa each of 20 F in series?

A. 200 F

B. 2 F

C. 100 F

D. 0.5 F

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4

A capacitor is basically constructed of

A. Two conductors separated by a dielectric

B. Two dielectric separated by a conductor

C. Conductors and dielectric

D. Conductors and semiconductors

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4

Delta to wye or wye to delta transformation technique is applied to a ___ network.

A. One-terminal

B. Two-terminal

C. Three-terminal

D. Complex

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4

For greater accuracya the value of phase angle should be determined from

A. Cos

B. Tan

C. Sin

D. Sec

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4

What fusion of elements is without chemical action between them?

A. Mixture

B. Compound

C. Alloy

D. Ionization

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4

What is the other name of relative permittivity?

A. Dielectric strength

B. Potential gradient

C. Breakdown voltage

D. Specific inductance capacity

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4

In an ac wavea 30 degrees of phase is ___ of a cycle.

A. ½

B.

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Which waveform in which the rms value and the mean value are equal?

A. Square wave

B. Triangular wave

C. Sine wave

D. Sawtooth

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A term used to express the amount of electrical energy stored in electrostatic field.

A. Joules

B. Coulombs

C. Watts

D. Electron-volt